The Congress MLAs started 320 km padyatra, against illegal mining in Bellary and to highlight failure of the BJP government.
The Congress leaders will walk for 20 km every day, covering an average of 3 km per hour for 15 days.
Earlier, Opposition leader Siddaramaiah met Governor H R Bhardwaj on Saturday, Jul 24, and requested him to direct the BJP government for protection to the Bellary chalo padayatra programme.
However, in a bid to counter Opposition Congress padayatra, the ruling BJP announced holding of four rallies across the state from Aug 2.
"The BJP campaign would highlight two years of our government's achievements and Opposition's anti-people stance in contrast to the 15-day Congress padayatra to 'protect' the state," BJP state unit president K S Eswarappa told.
K S Eswarappa said BJP has chosen Davanagere, the central part of Karnataka for its first rally, to be followed by rallies at Gulbarga on Aug 5, Mysore on Aug 12 and the final one at Bellary, home district of the three Bellary Ministers, on Aug 20.